Washing machine



April 14, 1953 Flled March 20 1948 April 14, 1953 w. R. WALKER'2,634,739

WASHING MACHINE Filed March 20, 1948 8 Sheets-Sheet 2 00000000 VOOOGOOG.INVENTDR MlLLAmx RAILKER TTPIYFY April 14, 1953 w. R. WALKER WASHINGMACHINE:

8 Sheets-Sheet 3 Filed March 20, 1948 INVENTUR WILLARD R. WALKER www TTDPNEY April 14, 1953 w. R. WALKER 2,634,739

WASHING MACHINE Filed MaICh 20, 1948 8 Sheets-Sheet 4 3,0/ l fN vL'NTmQWILLARD RWALKBH EYES/*@FM TTURNEY Ap 14, 1953 w. R. WALKER WASHINGMACHINE 8 Sheets-Sheet 5 Filed March 20, 1948 NVENTUR XIII LLAnn R.WALKER BY TTDHNEY Apri 14, 1953 w. R. WALKER 2,634,739

' WASHING MACHINE Filed March 2o, 1948 8 sheets-sheet e l [NVE NTUHWILLARD RWALKER T Tammy* April 14, 195.3 w. R. WALKER 2,634,739

WASHING MACHINE Filed March 20. 194B 8 Sheets-Sheet 7 251 INVENTUR 250WlLLARnRWLKER T TJPNEY April 14, 1953 WR. WALKER 2,634,739

WSHING MACHINE Filed March 20, 1948 8 Sheets-Sheet 8 182 A A l WILLARDEWALKER 24a A TTUHNEY INVENTUR l l Patented Apr. 14, 1953 WASHINGMACHINE Willard R. Walker, Syracuse, N. Y., assignor to Easy WashingMachine Corporation, Syracuse, N. Y., a corporation of DelawareApplication MarchZO, 1948, Serial No. 115,985 9 claims." (o1. 134-182)This invention relates to washing machines, and more particularly to amachine for Washing dishes.

In dish washing machines, it has been proposed to provide a circulationof water over dishes by the use of a power driven impeller submerged orlocated within the lower portion of the washing compartment. Circulationof wash uid within the compartment by such means in general has failedto provide a satisfactory washing action due to failure to place asufficient quantity of water in circulation under sufcient force and insuch a manner as to reach all essential surfaces of the dishes subjectedto Washing action.

The present invention is directed to a combination of elements includingan impeller so constructed and arranged as to provide movement of largequantities of washing uid in a flush action adapted to reach allsurfaces to be washed. The arrangement is such that a minimum amount ofwash fluid is required. The invention further has to do with theadmission of washing uid to a washing compartment through a central topsupported spray. Additionally, the invention is directed to a controlmechanism for metering the Washing fluid and for interruptingv washingaction vupon opening the wash compartment lid.'

Further features of the invention have to do with cabinet constructionincluding top deck, from which the washing compartment is substantiallysuspended and in which the deckv is pro-v vided With a flush top lid.Further features relate to interlocking mechanism for initially openingthe lid and suspending washing operation, and other details of cabinetincluding a lid hinge construction and soap and other storagecompartment spaces advantageously located Within the connes of thecabinet.

The invention also has to do with the simplication of the dish washingmachine and cabinet construction as a whole, with a view to facilitatingthe manufacture thereof economically and at the same time providingdurability and ruggedness.

The above and other novel features of the invention will appear morefully hereinafter from the following detailed description when taken inlconjunction with the accompanying drawings. It is expressly understoodthat the drawingsare employed for purposes of illustration only andare'not designed? as a definition of the limits of the invention,reference being had for this purpose to the appended claims.

In the drawings, wherein like reference charac Y ters indicate likeparts:

Figure 1 is atop plan View of the dish wash' ing machiney Figure 2 is a,front elevation; Figure 3 is a transverse vertical section through themachinev taken substantially on the line 3--3 of FigureZ;

Figure 4 is a transverse horizontal section taken on the line 4-4 ofFigure 3;

Figure 4a is a fragmentary view of the im" Figure 6 is a horizontaltransverse section tak-l en substantially 'on the line 6 6 of Figure 3;

'Figure 7 isa fragmentary sectional View taken substantially on the line1--1 of Figure 6, and

showing door hinge details;

Figure 8 is a fragmetary section taken 'sub-'-A stantiallyon the line 88 of Figure 6, showing details of the initial door opening mechanism;

Figure 9 is a vertical section taken substantiallyon the line '9-'9 ofFigure 3 immediately inside the front panel and showing door and lidinterlocking mechanism;

Figure 10 is a section taken on the line lll-I0 of Figures 1 and .11;1

Figure 11 is a section taken substantially on the line II--Il of Figure10; y Figure 12 is a transverse section taken substantially on the linei2|2 of Figure 3, show' ing the lid-supported spray nozzle;

Figure 13 is a, transverse section taken on the line l3--l3 of Figure12;V

Figure 14 is a fragmentary section taken on the line lll- I4 of Figure1, showing the fluid connections to the spray nozzle;

Figure 15 is a broken section taken substantially on the line |5--I 5 ofFigure 14, to illustrate the lid hinge details;

Figure 16 is a transverse section taken on the line lli-I6 of Figure 2,illustrating a soap compartment feature;

Figure 17 is a broken section taken on the line II-H of Figure 16,showing the hinge con-- The top deck 22 has a rear substantially uprightsplash panel 32 formed at its opposite ends tcprovide inclined controlreceiving panels 341 and.-

36. The top is provided with a circular" lid hinged as at 4|) to coverthe circular` dish-.Washing container disposed immediately therebelow.

At the base, below the door panel wie prof-A vided =a foot recess 3|formed from an angle member 33 extending from. one sidewall to'the otherand suitably joined thereto. asv by, anges. The sideV walls are formedwith forward and rearward angle portions 25 and 21, which may beintegral, or in theO-rmoangle members securedAV to the' side panels,Ytclprovide stiffness;

)In `Figure 3, the top deck 22isshown as formed:

Vwith a rectangular external depending marginal ila'ngefiadapted. tooverlap the: side and front walls. A circularly extendingv and.depending flange 44 forms the upper rim. ot thel dish washingcompartment 4t. The nange is oiset asat 48y andYA secured to thecylinderl wall 5t. oi the compartment $5.- Thelower end of:A thecylinder wall 50 is provided withabottom memberii.` having a. conical orsloped.Y outer portion. 54 and an annular central cone 5B within whichis mountedfza' frame 58 forl journaling an impeiier shaft 6|). The frame58 is composed efv conicalY and flat spiders 62 andft, respectively,provid@ ingsupport for spacedV bearings 66 an'd on the shaft 60., Theannular trough` 12: between the inner cone- 56 and4 thev conical wall..54 may be slightly dished as at 14 and maybe dishedto a somewhat greaterextent and pitched progres sively toward the drain'cut1et16apitchamount-1A ing to yabout a half inchy dropin level'to-the drain portfl 6,being satisfactory.v

The conical outer portion of. the bottoni` is providedwith-a pluralityvof 'bracket plates :18; also acting as bafiles, having dislr containingbasket receiving, ats. Sii, the atsbeing'adapted tosupporta basket. 82with its. bottom grid dslightly above and clear ofthezimpeller-.Scarried onf. the;` impeller cone and shaftv 60. Thebasket is composed of upwardly extending wiresk tijoinecl byr circularwires 910. The bottom grid thereof is'formed from radial` step-likewiresV 92. joined by a plurality of circularwires94 of varyingdiarneter, the circular wires llfproviding.` an inclined base. forreceiving glassware and cups,V it being desired that such be supportedat an angle so that any flat surface thereon will naturally drain. Thevcenter portion of. the base. is provided with a grid cup 96 into whichisv removably positionedY a perforated container 98 for holdingsilverware andthe like. A second basket, here'- inafter disclosed (seeFigures 22, inc.), may be employed for ilat dishes, the same being soconstructed as to support the iaty dishes on'ed'g'e, and tangentiallyarranged,V such. that water splashed upwardly from the impeller willstrike thefaceV ofv the dishes substantially normal from beneath, andthus flush upwardly across the dishes.

The compartment 46 will be seen to be suspended from the top deck ange44 through the side wall 50 and braced by means of stays |60 reachingfrom brackets H32 in the corners of the cabinet and secured to thespider 84. The stays extend yat a slight angle to the horizontalpreferably to give the eiect of holding the compartment and.. top deck22 clown, las Weil assteadying the impelier bearing housing with respectto the cabinet structure.

The top deck 22 is provided with a lid receiving offset |64 (see Figures3 and 10) of a suiicient depth to receive the return bent circularedgeIiormedon the ring extension |01 of the` lid. 331i',` withv the top lidsurface lying substantially flush with the adjoining deck surface. The.ring extension It? is provided with a depending skirt mi? the upperportion of which is secured to a frange of the lid 38 and the lowerportion of which vextends downwardly substantiallyV thedistance of theoset 48 previously described in connectionwith.A the top deckcir-: lcular flange 44. Thelid Sais hingedf atythevrear upon yspaced hingepins. I I2 and: I I4 received in rolled sleeves HGand ||8 formedzinrtheplate-like hinge strap #.20 whicnis securedrtothe'lidf. asseen inligYures- 14. and: l5. The hinge pins are received stationary pin-receiving;sleeves |22. which ,arein turn spot-welded or. otherwise-v secured-`tcthe'V back panel 32 as at |724 The'sleeves |22. have forwardextendingV arms. |26- and |28fhaving detent receiving. dimples |13cand|32 adaptecl.to cooperate with spring-pressed. detentvpins |34 and |36carried in a double bent bracketisecuredk to the upwardlyextendingportion. |49' of the hinge strap |2ii.. Asfw-ill, be seen, thedetent pins |34 and |36v are provided withA collars |42. and idliagainstwhich theoppositeY ends oa compression springl |46 act.- It will alsobeseen.

thatthe dimples. |32 and |30 are so positioned as to. receive thedetent. pinsv |42r and l-.44when` the lidisswung to asubstantially'upright-'posiLr tion. A 1

The' lid' 3&3 supports substantially in thecenter thereofV a. spr-ayVnozzle |48 supplied byfwater: througzhra' duct lwiormedby the'under sideof the lid and a. channel member.Y |52. The duct ex-rtends to the rearor hinged edge of thezlidf and isV enlargedY as atv |54 and terminateswith-- the skirtl 08. Theskirtiisfprovided with a rectanguflar aperture|58 adapted to cooperate with a rec-l tangular rubber nipple` |53 moldedto. an, apen ture: l in the top deckiangedlldminediately above. theoiset- 48. A suitable conduit |62V is` connected to the nipple |56 andis connected by a flexible'hose or other conduit lto a valve controlledsource ofr supply |66-, the valve being actuated preferably byelectrical means such-as a solenoid |68.

. The spraynozzle may be of inverted crown shape as at I'Hlwith one ormore spiral slots |72 in the side` wallthereoi. The nozzle is rotatablysecured in place upon a center screw |74 extendingv intera threadedrecessv member I 16 fastened upon the under side of the lid 3%;centrallylocated within' the conduit |56; The nozzle may be formed. inany desired manner as two similar halves, and includer therebetween twosimilar membersV so formed as to provide opposed iden-- tical inclinedinternal partitions or blades |'||,1 and integral vradial vanes` |13,the vanes each having an integral curved extension forming together twohalves'of anupper bearing sleeve |15,v In such a construction; two-vslots |12 Yare ein.l

ployed, such slots being located tangent'to the under side of the vanes|13. The members may be soldered, brazed, mechanically locked orotherwise secured together along the seams such as |11, to form anintegral whole.

The channel member |52 is provided with a circular aperture |18 in thelower wall thereof and at its end, the aperture being in alignment withthe spray nozzle H8. The water, being directed downward under pressureinto the nozzle, produces rotation thereof by impinging upon theinclined partitions I'H.

Wash water admitted to the compartment 48 is agitated and thrown insubstantially all directions by the action of the impeller 85. In Figure4, the impeller is shown as comprising a conical supporting hubstructure 80 to which are secured opposite impeller blades |82 and it.The irnpeller is adapted to rotate in the direction of the arrow A andin practice, may rotate at a speed in the order of 700 R. P. M, Theblades are sup# ported upon slip-like brackets 83 and i 85 secured tothe cone |853, and radial extensions |81 and |89 of the leading edgeends of the vanes, which are likewise secured to the cone |88.

The blades |82 and |86 differ in shape both at their trailing edges andat their leading edges as may be seen from Figures i and 4c. The leadingedge |85 of the blade |82 is horizontal and is adapted to travel in anorbit slightly above and over the inner radial half of the drain channel14. The leading edge |88 of the impeller itil is located at a somewhatgreater height above the drain channel 'M and is so arranged that theactive portion of the blade |89 at the leading edge sweeps in an orbitover the radially outer portion of the channel 'M The trailing edge |92of the blade |82 is cupped inwardly so as to throw the liquid scooped bysuch blade across the center axis as well as upwardly in the centralportion of the compartment 48. The trailing edge |9ii of the impellerblade |84 has a lesser slope and is adapted to throw wash liquid in theouter region of the compartment d6.

A basket for holding flat dishes such as plates, platters and saucers isshown in Figure 20. Such basket is formed of relatively stii wire ofstainless steel or other metal noncorrosively treated, and the elementsmay be welded, soldered or otherwise secured.V The basket comprises aplurality of radial wires 32.2 having upstanding end portions 324 attheir outer ends.

tached to the upstanding portion 321i to form a substantiallycylindrical basket wall. Between the radial wires `22 are positionedadditional radial stiffening wires $38.

` A plurality of return bent wire loops 332 are' positioned with thefree ends 33d and 336 extending downwardly and terminating at the gridbase, the outer end 334 being secured to a radial' wire in advance (asindicated by the direction of rotation of the impeller at) of the radialwire to which the inward end 33t is attached as illustrated. The loopsare of varied length to accommodate Various sizes and shapes ofcomparatively .dat dishes, and are slightly inclined in the direction ofrotation as is shown in Figure 22. 4The lower portion of the loop endsmay be offset as at 338 to in effect conform to the generally wellknownshape of plates and saucers and other shallow at dishes. It will be seenthat dishes in the rack will be supported in what may be termed aslightly inclined tangential arrangement, the tan- 'Ihe wires are'. tiedtogether by a plurality of concentric wire, rings 326, forming a gridbase, and rings 328 at gential arrangement being such as to place theconcave side of the dishes in a direction t0 receive the full force ofthe upward and tangential flush of wash water set in motion by theimpeller. This wash water in large quantities will ilow across thesurface of the dishes in the general direction as indicated by arrow F,the inboard portion of the dish being flushed primarily by wash waterfrom the impeller blade |82 and the out-- board portion of the dishbeing flushed primarily by'wash water from the outer impeller blade |84.

In practice, a limited amount of Wash liquidy will be employed, the samebeing retained within the compartment 46 by closure of a gate valve |96located in the drain pipe 16. The impeller blades' |82 and 84 arearranged to throw such water with considerable force into substantiallyevery portion of the compartment 46 and such water will thereafter drainpast deectors 18 downward into the channel 74, It Will be seen that, byreason of the leading edge |88 of the blade |84 being somewhat higherthan the leading edge |86 of the blade |82, only a limited amount ofwashiluid will be scooped by such blade and particularly the top stratasof the water contained in Thus,A there is a considerable the channel T.-layer of liquid allowed to remain in the channel which is subsequentlyacted upon by the leading edge |86 of the impeller |82. Thus, twoimpellers may be employed, each acting upon which is in' effect aseparate supply of liquid and permittingsuch liquid ample time to flowinto the channel lll by the edge revolution of the impeller.

Since the leading edges of the blades do not fall in the same path anddo not interfere with one another in acting upon liquid received in thechannel M, large quantities of liquid are thrown by the blades ascompared with a two-bladed impeller in which the blades are identical.rBecause of the large quantity of liquid which may thus be thrown, theextreme velocities heretofore thought essential may be reduced becauseof thel greater quantity of water actually thrown into splashcirculation. Impellers heretofore have been rotated at high velocity toincrease the washing action, but the amount of water which could findits way to the impeller'for scooping was so slight as to defeat thedesired result.

By eliminating the interference between the succeeding impeller bladesas vthey move in their respective paths, that is by having them act indierent orbits, great quantities of wash fluid are put in circulation,resulting in faster washing action with maximum cleaning eiiiciency. Thechannel has more timeto fill, since the blade only scoops the channelonce in a revolution, instead of twice as two similar blades would.'v Atthe same time, the impeller may, and will be,

f any time as during its return'to the sump along the side andconicalwalls'. y

` It will be seen that by employing two racks, one for glasses and cupsand the other for dishes, the disk raokvwill vbe loaded while theglasses and cups are undergoing the relative1y brief w'aslf cycle.within the'machinei. Immediateh': unen.- compl'etiozr of the;Washingo1vv they cups and, glasses.. theev rack` contain-ing: theseitems; is re moved from the .machine andthe; diskraCk; inv. sorted',after which the/washingcycle is. repeated; lit will; be.. appreciatedthat it be. desirable to. enzniloyA a. somewhat longer.washingneriodtortne dishes and; .that this-is undertheoornnlete centraliof: the.operator-L Y"lheiimpeller 6,8 is driven-through a.: belt drive;V

lffromi a motor Zee suitably mounted upon-.thesiffle?.members;v of; thecabinet.` side, wall 2:4., rl'he motor ismuunted: with its axisvertical, upon. a,Y

bed. pla-.te zur. the latter' being pirated. between spaced angle irons.2&3.- secured tir the. side-wall.

2k.. only-one ciwhiclr angle-ironsis shown...

vThe ton lid-r4 due toits dushrarrangement with; the-:top: deck.; isprovided. with; a lifting pin 2M (see Figure 9)adaptedltoiinitiallyraise-'the outeredge or the; lidY a sufficientdistance to permit grasping the. edge by the operatorzs:` rlgors.. Thepin 2.92 isliftedby a; knob-actuatedcanrilli actingu-pon aleai spring;2.0.6., the-tree end of. whichA is ruiten-ed as atZtSto-engaee-anannular groove 210 in. the-pin Q92.. The leaf spring Zea issupportedat its other end; upon an ear 212 of. the; plate 244 theplate.also being-provided with ears 21.6 and 2 L8 havingapertures throughwhich the pin. 202 may freely slide. rThe.- plate 2id is secured to theouter side of the angev ldd and the pin. 202 projects; upwardlythroughan opening 220V in. thevr oisetz 104 to4 engage the-return. bentflange |06l of the-ringextension ll'l.

'1T-he cam 204 is mounted uponv a short stub shaft 222 extendingAAthroughv a knob receiving recess 22.4 in the front panel. The shaft hasaflixed thereto a knob-226.. The cam 2cd is fur-- they; providedv with.a second cani, extension. armr 2.2.8y for actuating asliding-doorrelease bar. 23o. The bar is slidable in a guide 2.32locatedimmediately. abovethe door andin. an ear 23.4 formed on. the plateextension member; 236. securedto the plate 2;!14. The cam armV` 228. issuch that rotaticnoi they stub shaft 2.2.2, as seenin Figure 9.-,countercloclswise. the. lid is opened; whereas upon rotation of suchshalt by the knob in a, clockwise direction, the bar 23.@ is lifted. Ahair pin spring 23B in combination with the leaf.v spring is adapted tonormally hold the arms 204 and 28I substantially in the position shown.

In. order tovr provide an interlock between the. mpeller driving, motorZl, the lid 38, and the spray nozzle carried thereby.. to prevent, acciadental nodding of the operator by accidentalr opening, of the. lid, thepin 2il2, which is. adapted to lift. the lida slight. distanceto make,it possible to open` the. lid.. engages, at its. lowerr end. theactuating arm 2.40. of a cut-.out switch 24.2. The. cut-out switch maybe. in circuit with the valve solenoid [63 as well. as themotor 226 sothat the water inlet is4 outA ofi andthe. impeller action broughttoaston., It wllbe appreciated that the depending skirt. llll oV they lidis, of sufficient length tdtelescope the upper compartment Wall, to,prevent splash trom the compartment when the lid. is. elevated to theinitial open position by the pin 202. The relatively slow speed. of theimpeller and the damping actionof the wash water. in which it operates,4tends to immediately bring the motor to rest so that danger of opening.

the lid too quickly is minimized.

Control of the washing. operation. is accomplished through a manuallyactuated timer 244. on the back panel 32 and. an` adjacent motor switchZilli.y Acircuit. suitable for controlling. the.

Y A lid-operated switch 2,42- is in circuit-:witlrthef motor only, sothatwhile operationl of` the met-or isy immediately stopped, should thelid loe-raised for any reason, the. time cont-rolled metering; offYwashwater Willnotbe interrupted by--inadvert nt.

,- opening orY slightrraising of thelid. It will be nt that; aIproperamount:y of; Water be introduced into.- the.; machine and anyinterruption wou-.1d disturb-the action. of the timer in. providing thecorrect,- amount of; water. The timer 24A; includes an. electricallydriven clock motor d5 which acts; to open; the switch 2-5-3 which isinitiallyclosed by' the panel: knob. 2tl- A Signal light 2&9 iS.provided.- in circuit with the timer-so as to warn-the opera tor againstopening; theV main control-switch 26.6; inadvertently while wasn` fluidis, bein-gmetered.l Copendingl application of Swayze,v Serial No.793,065-, ii-led-December- 22;: 194.7, now Patent. No.. 2,562,481,yissuedvJuly 31, 195.1, discloses a. timer manually initiated such as maybe employedthe circuit described.

There is also provided a drain control actuata ing the swinging gatevalve 1,96 througha Bowden Wire control 2&9. comprising a cable 25|-attachedv to the lever arms 253 and Z55 on the manual knob 257 and valvei196 respectively; the conduit 259- being supported at its en d by fixedbrackets 261,-.. 253-, respectively. A wide opening Valvev ofv the.swinging gate type is desirable in orderY to allow for fast drainageapproaching a flush. The pitch ofthe channel. or trough 'F2 facilitates;flush op-F eration so thatv any tendency for particles of ioodi toremain in the compartment is minimized. It; will be understood thatamotorV driven drain pump of large capacity may be utilized to dise.charge. waste, if,` desired, where gravity drainage is not available, orwhere. the drainage. would otherwise bey sluggish. If drainage ishadintoan adjoining sink of an elevated level, the Valve could4 bedispensed with where such a pump isy employed.

The timer 24.4 is connected in circuit with the inlet valve actuatingsolenoid lSS, and controls, by xingy the time, of flow, the. amount of.wash Water, admitted to, the4 compartment. Where Pressure ofthe line.vvaries substantially. a. con-.sstant flow regulating Valve may beinserted in the 'outlet |67 oi the valve I lili.v In a normal.. washingoperation, the quantity of waterJ may beV limited to approximately onegallon. The motor switch rontrolsv thev motor driven impellerVv andassuming. a proper quantity of soap or detergent and water has. beenintroducd into the comparte ment; the motor is` operated forapproximately 3.. minutes to eiect washing operation. Thereafter.through. a manual actuation of the drain valve, the wash water isdrained. Subscquentlyf,v the. drain Valve. is closed and a. .rinsingoperation er-v fected, the rinsing operation resulting from theadmission of rinse water through the spray and; the actuation of theimpeller. Following the rinse operation, the drain. is again opened andthe washing operati-on is complete. The rinsed dishes may be left in thedishwasher, and to facilitate the dryingv of` such. dishes,thecompar-.te ment is provided with avent A252 located inl the;v

rear wall near the top. The vent is inclined upwardly vto preventleakage therefrom, but permits the interchange of air Within thecompartment tofacilitate drying and to keep theairtherein fresh;.

The front wall of the cabinet can be provided Witha soap compartment254, the same being constituted by a pivoted drawer-like constructionswinging on a vertical axis. 'I'he front panel is provided with anaperture 25B to receive the drawer'258.,V Adjacent the top and bottommar gins of the aperture 256 are inwardly struck hinge brackets 280 and262 through which extend a hinge pintle 264. The drawer 258 has a bottom265, a forward wall'268 having a panel 218, inside walls 212 and acurved wall 214. The inside wall 212 has a hinge bracket 216 havingapertures to receive the hinge pintle264. The curved Wall 214 iscylindrical and of a curvature having uniform radius about the pintle264. The panel 210 extends to the left of the hinge axis of the pintle264and is Yrecessed as at 218 to receive fingers of an operator, itbeing observed that by pushing the recessed portion 'of the drawer, itwill be swung open. A suitable latch to hold the drawer in closedposition may be formed by a leaf spring member 288 supported from theside wall 24, bearing against blister 282 formed in the curved side.wall 214'. The opening movement of the drawer is limited by inwardlystruck ngers 284 f and 286.1'

The access door 30 located beneath the front panel 28 may be'composed offront and back members 288 and 298 having telescopic flanges 282 aroundtheir marginal edges. The door is hung on upper and lower hingepins 294and 236 supported in stilening plates 298 and 300. The stiffening platesare secured to a lower flange 382 of the panel 28 and to a bracket 304secured to the recessed base, respectively. As has been previouslydescribed, the door is normally held shut by the latch bar 238 actingupon a door-carried bracket 30B. The door is adapted to be initiallyopened by the limited movement of a spring plunger 388 (see Figure 8)The spring plunger is mounted for horizontal movement in a bracket 3H!arranged on the flange 302 so as to bear against the inner surfaceadjacent the free end of the door. The plunger 388 has a compressionspring 3|2 threaded on a guide rod 3M which extends through the end ofthe bracket 3 I 8 and is tted with an end stop 3I6. It will thus be seenthat upon movement of the latch bar 230 upward to disengage the bracket386, the door will be sprung open a short distance by the plunger 308 tofacilitate its further opening by manually grasping the same.

Although a single practical embodiment of the invention has beenillustrated and described, it is to be understood that the invention isnot limited thereto. As various changes in construction, selection andarrangement of the parts may be made without departing from the spiritof the invention, as will be apparent to those skilled in the art,reference will be had to the appended claims for a definition of thelimits of the. invention.

What is claimed is:

l. In a dish washing machine, a casing forming a. dish washingcompartment, having side walls and a bottom wall, said bottom wallhaving an 4annular substantially nat-bottomed sump formed therein, andsloping walls extending to said side wall, an impeller mounted forrotation on an axis concentric with said annular sump,

10 said impeller having ytwo blades the leading edges of which sweepsaid sump, one leading edge sweeping -a path axially spaced above theother, said blades being diametrically opposed from one another. .i

2. Ina dish washing machine, a casing forming a dish washingcompartment, having side Walls and a bottom wall, said bottomwall'having an annular substantially nat-bottomed sump formed therein,and sloping walls extending to said side wall, an impeller mounted forrotation on anV axis concentric with said annulansump, said impellerhaving two blades theV leading edges of which sweep said sump, onelleading edge sweeping a path radially inward and; axially spaced withrespect to the other, said blades being diametrically opposed from oneanother.

3. In a dish washing machine, a casing forming a dish washingcompartment, having side walls and a bottom wall, saidbottom wall havingan annular substantially Hat-bottomed `sump formed therein, and slopingwalls extending to said side wall, an impeller mounted for rotation onan axis concentric with said annular sump, said impeller having twoblades the leading edges of which sweep said sump, one leading edgesweeping a path axially spaced Vabove the other, and one having atrailing portion adapted to impel'uid in a region radially spaccdrrfromthe other, said blades being diametrically opposed from one another.

4., In a dish washing machine, a casing form.- inga; dish washingcompartment, having lside Walls and a bottom wall, said Ibottom wallhaving an annular substantially fiat-bottomed sump formed therein, andsloping walls extending to said side wall, an impeller mounted forrotation on an axis concentric with said annular sump, said impellerhaving two blades the leading edges of which sweep said sump, oneleading edge sweeping a path radially inward and axially spaced withrespect to the other, and one having a trailing portion adapted to impelfluid in a region radially spaced from the other, said blades beingdiametrically opposed from one another.

5. In a dish Washing machine, a casing forming .a dish washingcompartment, having side Walls and a bottom wall, said bottom wallhaving an annular substantially flat-bottomed sump formed therein, andsloping walls extending to said side wall, a plurality of vane-likeangularly spaced baies lying substantially in axial planes secured tosaid sloping Walls, and acting as supporting brackets for a dishcontaining basket, an impeller mounted for rotation on an axisconcentric with said annular sump, said impeller having two blades theleading edges of which sweep said sump, one leading edge sweeping a pathradi-ally inward and axially spaced with respect to the other, saidblades being diametrically opposed from one another.

6. In a dish washing machine, a casing forming adish washingcompartment, having side walls and .a bottom wall, said bottom wallhaving an annular substantially flat-bottomed sumpV formed therein, andsloping walls extending to said side wall, a plurality of vane-likeangularly spaced baiiles lying substantially in axial planes secured tosaid sloping walls, and acting as sup-- porting brackets for a dishcontaining basket, an impeller mounted for rotation on an axisconcentric with said annular sump, said impeller having two blades theleading edges of which sweep said sump, one leading edge sweeping a pathradially inward and axially spaced with re- `Spent to thezother, and4one ,havingta trailing portion adapted to .impel .ud in a.regionradially spaced `from 'the other, said bladesbeingdiametrical'lyfopposed fromone another. 7. In a dish washing machine, acasing forming a :dish Washing compartment, having side iwalflsanda'bottomwall, said bottom wall having an annular :substantiallyflat-,bottomed sump formed therein, :an impeller .mounted .for vrotationon .axis :concentric with .said .annular rsump, .said impeller 'havingtwo blades .the leading .edges .0f which :sweep .said sump, :one leadingv.edge sweeping .'a rpath axiallyr spaced v'above .the other, 4saidblades vbeing .diametrically opposed :from one another. Y

i8. V mia-'dish washing machine, a casing 'forming a dish washingcompartment, .having y'side walls and 'a bottom wallfsaidbottom wallhaving an :annular sump, .an -im'peller` mounted for `rota-- tiondonV.an axis v'concentric with said vannular snmp, said limpel'ler'havin'gtwobl'ades .the `*leading -edgesolfiwhi'ch sweep saidsump, yone leading:edge sweeping .a path radially vinward.fand axially spacedWith'respec't'lto the other, saidv blades being diametrically opposed.from one another.

v9. In .a dish Washing machine, .a casing 'forming ia VYdish washingcompartment, .having side Walls and Aa bottom WalLsaid bottom Wallhaving y'anannular sump, ,an impeller mountedifor rotation 'son an axis.concentric with 'said annular `sump, said impeller having two'blad'es.the leading

